Debora Stokvis-Farbstein was the widow of Jules Stokvis, chocolate manufacturer (Kwatta) in Breda, and the mother of Ellen Stokvis.
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For more information on Debora Stokvis-Farbstein, see:
D. Giltay Veth and A.J. van der Leeuw, Het Weinreb Rapport, deel II (Den Haag 1976) 206 and 462.